Question

Ball 1 with mass 4 kg is
connected through a mass-less rod with ball 2 with mass 3kg. The
system is rotating at angular speed 8.00 rad/s about a vertical
axle going through the center of the rod.

a) How far away is the center of the mass of the system from the
axle?
b) Find the kinetic energy of the system?
c) What is the net force on each ball? (Hint: try to apply
F=m(v^2/r) and the relation between angular speed and velocity)